Fix scope for LaTeX macros.

They should by default scope over the group in which they
are defined (except `\gdef` and `\xdef`, which are global).
In addition, environments must be treated as groups.

We handle this by making sMacros in the LaTeX parser state
a STACK of macro tables. Opening a group adds a table to
the stack, closing one removes one.  Only the top of the stack
is queried.

This commit adds a parameter for scope to the Macro constructor
(not exported).

Closes #7494.

1 files changed, 50 insertions, 0 deletions

diff --git a/test/command/7494.md b/test/command/7494.md
new file mode 100644
index 000000000..d8a2ff7a5
--- /dev/null
+++ b/test/command/7494.md
@@ -0,0 +1,50 @@
+```
+% pandoc -f latex -t plain
+\def\foo{BAR}
+{\foo
+\def\foo{BAZ}
+\foo
+}
+\foo
+^D
+BAR BAZ BAR
+```
+
+```
+% pandoc -f latex -t plain
+\def\foo{BAR}
+{\foo
+\gdef\foo{BAZ}
+\foo
+}
+\foo
+^D
+BAR BAZ BAZ
+```
+
+```
+% pandoc -f latex -t plain
+\newcommand{\aaa}{BBB}
+{
+\renewcommand{\aaa}{AAA}
+\aaa
+}
+\aaa
+^D
+AAA BBB
+```
+
+```
+% pandoc -f latex -t markdown
+\newcommand{\aaa}{BBB}
+\begin{quote}
+\renewcommand{\aaa}{AAA}
+\aaa
+\end{quote}
+\aaa
+^D
+> AAA
+
+BBB
+```
+